/// <summary>
 /// 解密
 /// </summary>
 /// <param name="code">需要解密的字符串</param>
 /// <returns></returns>
 public static string Decrypt(string code)
 {
     return(Decrypt3Des(Base64Encrypt.FromBase64(code), _defaultKey, _defaultIv));
 }
 /// <summary>
 /// string to encrypt string, use default key and iv
 /// </summary>
 /// <param name="plaintext">明文</param>
 /// <returns>密文</returns>
 public static string Encrypt(string text)
 {
     return(Base64Encrypt.ToBase64(Encrypt3Des(text, _defaultKey, _defaultIv)));
 }